Gripe for spring harrow and cultivator teeth



(ModeL) J. P: WARNER.

Gripe for Spring Harrows and Cultivator Teeth.

No. 233,718. Patented Oct. 26, I880 UNTTED STATES PAT NT @rricn.

JASPER P. WARNER, OF DOWAGIAG, MICHIGAN.

GRIPE FOR SPRING HARROW AND CULTIVATOR TEETH.

SPECIFICATION forming part of Letters Patent No. 233,718, dated October26, 1880.

Application filed August 4, 1880. (Model) To all whom it may concern:

Be it known that I, JASPER P. \VARNER, of the city of Dowagiac, countyof Cass, and State of Michigan, have invented a certain Improvement inGripes for Holding and Adjusting the Spring-Teeth of Harrows andCultivators, of which the following is a specification.

The object of my invention is to furnish a gripe for spring harrow andcultivator teeth by their edges, where a more permanent fastening can behad than fastening at their sides, where there is constant springing,which causes the teeth to work loose; also, byfasteuing teeth at theiredges they can be placed wholly upon the inside of a harrow-frame,leaving the outside surface smooth and not liable to catch on snags,roots, stones, or growing grain while being drawn forward.

By the use of my gripe the teeth can readily be changed from a hookingor digging tendency to a dragging or scraping one. The gripe admits alsoof setting the teeth up or down to gage the depth of work or to increaseor decrease the spring of the teeth, as is often required.

By the use of my invention the teeth are firmly held in any desiredposition without drilling or punching holes through them, as is nowdone, requiring extra labor, and weaking the spring-teeth where the moststrength is needed. By the use oi this gripe the springteeth may besharpened at both ends, and the ends may be swaged of different widths,as I do not fasten at their ends but below them.

' To enable others skilled in the art to which my invention belongs tomake and use it, I will proceed to describe its construction andoperations.

In the five drawings forming a part of the specification, Figure l is atop view of the device embodying my invention. Fig. 2 is asideelevation, withthe tooth B and cap D shown in a changed position, asshown by the dotted lines. Fig. 3 is a horizontal sectional view on theline as :v in Fig. 2. Fig. 4 is aface view of the shoulder-iron E upon asection of the harrow-frame A. Fig. 5 is a face view of the inner end ofthe central section, 0, showing its row of cast ridges c c.

The harro wgripe consists of three metal sections, as best shown in thedrawings, Fig. 3,

consisting of the parts E, O, and D, respectively. The section E iscalled the shoulderiron, as it is provided with a long bearing upon theharrow -frame A back of the bolthole cast in it, through which the boltF passes and holds it to the harrow-fraine. The shoulder-iron isprovided witha hnb,K, about two and a half inches across, and is twiceas thick upon its back sideas itis in front, which causes the tooth, inthis instance, to stand on an angle of about thirty degrees to that ofthe sides of the harrow -frame. Changing the thickness of the backportion of the hub K will change the angle of the tooth.

The shoulder-iron is provided with afiange, l, around the periphery ofthe hub K, which projects beyond the end of the hub one-fourth of aninch. the hub is a row of cast ridges, c 6, running from the flangetoward the center of the hub about half-way.

The upper and lower edges of the shoulderiron are provided with castprojections T, that just fit over the edge of the top and bottom of theharrow-frame A, which prevents it from turning on the wood-work. Aportion of the hub of the shoulder-iron is cut away in front, formingthe front side about one-half inch in front of the bolt-hole cast in it.The portion of the shoulder-iron back of the hub is about one-fourth ofan inch thick.

l'Vithin the flange l and around The central section, 0, at its innerend, is of flange on the shoulder-iron, which helps to hold it inposition. The central iron is circular upon the back side, but, like thehub K, has a portion of the circle cut away just in front of the holecast in, it to receive the bolt F. The inner end of the central sectionis provided with a row of cast ridges, c 0, same as described upon thehub K, which are intended to fill the spaces of each other when the twosections are forced together, which will form a lock and prevent thecentral section from turning around. The end of the central section justin front of the bolt-hole and upon the outside is provided with a rib,L, about onefourth ofaninch deepand about the same width, running thelength of the front side, forming a portion of the front side and actingas a jaw,

passing over the front edge of the spring-tooth B. The back portion ofthe central section is concave, extending from the inner end outward (inthis instance) one and three-eighths inch, designed to be long enoughfor aspring-tooth one and a half inch wide. The length of the concaveportion 0 of the central section will always depend upon the width oftooth used, and should always be about one-eighth of an inch shorterthan the teeth are wide. The concave portion of the central sectionextends around its inner end until the upper and lower shoulders standin line just in front of the bolt-hole through its end, and just back ofthe rib L far enough to form a groove wide enough to receive the edge ofthe spring-tooth B. The concave portion 0 of the central section isabout one-fourth of an inch in thickness, and its edges are square. Thedistance through the concave is about two inches.

The section 1) is called the griping-cap, It is about one-halt inchthick, and consists of two-thirds of a circle having a portion cut awayupon its front edge, leaving it smooth, and upon the inside, along thefront edge, is a cast rib, S, of thesame proportions as the onedescribed upon the central section, 0, and is designed to fit over thefront edge of the spring tooth B, just opposite the rib L on the centralsection. The backportion ot'the gripingcap is circular, and around itsperiphery, projecting from the inner side, is a flange, (1, ot' the sameproportions as the one described upon the shoulder-iron E, but having aportion cut out to form a groove wide enough to admit the edge of thespring-tooth B between the shoulders and the rib S.

The griping-cap is designed to fit over and onto the end of the concaveportion of the central section, and is made enough larger so the concaveportion will just pass within the flange dof the cap. Just back of therib S is a hole near the center of the cap through which the bolt Fpasses. The face of the cap is flat, having its edge slightly beveled.

To use the gripe the shoulder-ironE is placed upon the side of thebarrow-frame A, having a hole bored through it about three-eighths of aninch across. The bolt F is inserted through the frame and theshoulder-iron. The central section, (J, is then slipped upon the boltwith its end of cast ridges fitting into the spaces of the shoulderiron. The cap D is then slipped upon the bolt with its flange d fittingaround the concave portion of the central section. The nut is thenplaced upon the bolt. The spring-tooth B is inserted with its edges inthe grooves of the central section and gripingcap. The nut is turn edup, drawing the cap up to the central section, drawing the centralsection, with its ridges, into the spaces of the shoulder-iron, anddrawing the shoulder-iron firmly to the harrow-frame. Thus the bolt Fnot only holds the tooth in the gripe, but holds the gripe together andto the harrow-frame, a very simple fastening. As the length of theconcave ot' the central section is shorter than the tooth is wide,forcing the nut upon the cap causes the back portion of the cap to restupon the back edge of the concave, while the front portion, forming therib orjaw, is constantly pressed upon the edge of the tooth, holding itfirmly, as shown in Fig. 3; but by loosening the bolt F the bottom ofthe tooth may be moved backward or forward, as shown in the drawings,Fig. 2. As the tooth is moved backward or forward the central section,0. and the cap I) revolve around the bolt F, and by clamping the section(J to the shoulder-iron E, forcing the ridges together will hold thetooth firmly in its different positions.

The tooth may be raised or lowered in the gripe. By first loosening thenut and drawing up or pushing down on the tooth it will .slide throughthe gripe.

Having thus fully described my invention in the most exact terms that Ican give, what I claim as new, and wish to secure by Letters Patent,is-- 1. Ina harrow-gripe, the shoulder-iron E, with its hub K, flange Z,and ridges e c.

2. In a harrow-gripe, the central section, (3, with its rib L, ridges cc, and concave extension 0.

3. In a harrow-gripe, the griping-cap D, with rib S and flange d.

4. In a harrowgripe, the combination ofthe shoulder-iron E, centralsection, (J, gripingcap D, and bolt F, as and for the purposes shown anddescribed.

JASPER P. WARNER.

Witnesses:

Roscon B. WHEELER, U. F. INGLING.

